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Letters Patent No'. 81,669, dated September l, 1868.

IMPROVEMENT IN DRAUGHTEQUALIZER.

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"To ALLZWHOM IT MAY' CONCERN: t

- Be it known that I, GEORGE A. MbSIlEIt, of Champlain, in the county of Clinton, and State of.New York,

A have invented a new and useful Improvement in Draught-Equalizing Double-Tra e; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in. the art to make and use the same, reference being had to the accompanying drawings, forming part of 'this specification, in which, v p Figure 1 is a perspective view of my invention. I I

' Figure 2 is a diagram illustratingthe principle of its operation.

Similar letters of reference indicate like parts.

The object of this inventipiiis to enable two horses of unequelstrength or energy to be worked together withthebestresults. f I

It is diificult to"obtain'=a.'p'air of horses which fare perfectly matched with respect to endurance, strength, and spontaneity of eli'ortgand this unequal conditionrenders the weaker one, when both are working together,

to sustain more than its properehere of the'dranght-strain when the ordinary double tree is used. If one is l more spirited, the same result is obtained, and my invention is designed tr obviate these objectionable conditions.

It consists of the usual bar or double-tree A,, piyotcd to the tongue B, but is provided with cross-heads C, which cross-heads have a number of holes, a, b, &o., for the purpose of pivoting the clevises D D thereto.

The single-trees are attached to these clouds-es, which ure-pivotedatjm'ereh points by pins. Inth 1 W- ings,'two pins are shown, but in practice, both pins are not used in each clevie at once, unless the horses are very imperfectly matched with regard to endurance, strength, and working energy.

If the horses are equally free, but of unequal endurance, the weaker one will naturally fall behind, and by attaching the clevis of the weak horse rigidly with both pins, and pivoting theclevis of the stronger one to the front end of the cross-head, or approximating thereto, according to the excess. of his energy,'the leverage will then be in favor of the lagging horse, as is evident from the diagram, in which E is the front; of attachment of the laggingihorse, and G'that of the more enduring one. The lines new and n 21. exhibit the relative difference of leverage.

'When the horses are unequally free, and the freer horse is less enduring than the other, the leverage is to be in favor of the forward horse, which is provided by pivoting both clevises at'the rear ends of the cross-heads,

as illustrated by the lines D D. in the diagram. The relative difference of leverage is shown by the linesf'n and h. i v i When the freer liorse is more enduring-thanthe other, the clevis should be pivoted as in thcfirst case. The clevises are provided with a series of holes to correspond to those in the cross-heads.

. In the diagram, the angle which the double-tree makes with the tongue or line of draught B, is exaggerated, that the difference may more readily be seen by'inspection. V

The extreme cases have been taken also with reference to the pivoting of theLcIevises, but in practice it may be only necessary to pivot one clevis only'a short distance from the double-tree or line of equal driiught A, as indicated by the line II.

V The elongated heads of the double-tree may be obtained by'means'of cross-heads C O, braced, as shoivn, or by any other suitable elongation, at right-angles to the double-tree. The clevises may also be made of any suitable form. l

A legitimate-"modification of my invention would be the employment oi a single cross-head at the middle point of the double-tree, with a series.of holes to bolt it to the tongue.

This form would dispense with the cross-heads at the ends, and in some respects be more advantageous. Having thus described my invention, I claim as new, and desire to secure by Letters Patent The clevises D, constructed sis-described, and provided with a series of holes, 6, adapted for the passage of a pin, a, whereby said clevises are pivoted to the cross-pieces'G of the centrally-pivoted double-tree A, so as to be longitudinally adjustable thereon, as set forth. 1 w

. Y G. A. MOSHER.

Witnesses:

J. M. Homes, B. Wnsanna Howsx. 

